I am experiencing similar symptoms, just out of the blue dry mouth and throat, difficulty breathing and swallowing that can last from a few minutes to several hours. An almost panic attack-like state. Also, occasionally intermittent sinus pain, dry sinuses, etc., painful sensitivity when brushing teeth. I am perimenopausal-bordering menopause and am of the firm belief that these are symptoms of shifts in estrogen-progesterone levels. My symptoms just come and go which leads me to believe that they are attributed to hormonal level changes. I plan to begin using dry mouth remedies, and to chew more gum to stimulate saliva as well as sipping water frequently during these episodes. Keeping a journal of food intake, exercise, etc., can be very beneficial in tracking changes so that if it is the case of allergy you can quickly determine what food is indeed causing issues. Food allergies have become more prominent for me going into menopause; thus, I have drastically changed my diet. In order to determine foods that I am allergic to, I ate a very bland diet for several days, and then introduce one or two foods on the third day to test if I experience a reaction. I would immediately within a few hours experience either a small rash, facial reddening, difficulty breathing, palpitations, etc. I repeated this test and introduced different foods that I suspected every several days. This test was very accurate for me. I have a long list of foods that cause an allergic response through this method. I hope that this proves useful to someone.